545:. The tool should be as sharp as possible and the machine should be rigid, with minimal backlash. Higher power is required than to machine ordinary steels of similar
423:
of Havar foils are both essential for the tightness and the reliability of the cyclotron targets in hospitals while also minimizing the contamination of H
698:
Medical Device
Materials: Proceedings from the Materials & Processes for Medical Devices Conference 2003, 8-10 September 2003, Anaheim, California
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622:
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305:
is about 1480 °C. It will retain three quarters of its room temperature strengths up to 510 °C. Its
354:
521:, a solution used to test the resistance to corrosion of metals, the Havar alloy does not corrode at all at
459:, and named Dynavar. Later it was used as sensing diaphragms and other uses, under its current name Havar.
412:
785:
511:
770:
542:
525:, starts corroding rapidly (15 mm/year) at 70 °C, and reaches rate of 56 mm/year at
790:
66:
775:
760:
503:
448:
765:
416:
326:
318:
42:
755:
381:
310:
8:
507:
476:
499:
428:
334:
62:
780:
729:
702:
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681:
522:
472:
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366:
314:
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487:
385:
369:
362:
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538:
480:
749:
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302:
58:
46:
580: – Alloy of nickel and iron with low coefficient of thermal expansion
518:
404:
396:
392:
601:
452:
408:
199:
69:
565:
468:
420:
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338:
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218:
54:
50:
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546:
391:
Havar foils are frequently used as window material for high-energy
377:
180:
142:
571:
342:
322:
306:
598: – Carbon-containing wear resistant cobalt-chromium alloys
237:
161:
123:
38:
583:
577:
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456:
436:
34:
20:
484:
330:
275:
586: – Solid-solution binary alloy of nickel and copper
604: – Alloy with higher durability than normal metals
568: – Corrosion-resistant and high-temperature alloys
514:
are higher than of other cobalt-based implant alloys.
537:
Havar is difficult to machine, as it undergoes rapid
447:
Havar was originally developed in the late 1940s by
388:, and various other high-temperature applications.
80:The composition of Havar alloy is the following:
747:
574: – Austenitic nickel-chromium superalloys
353:Havar foils of various thickness are used as
19:For the village in North Khorasan, Iran, see
694:
435:(Cr, Mn, Fe, Co, Ni, W, Mo) present in the
592: – Cobalt alloy used in watchmaking
84:Composition of Havar alloy (wt. %)
462:
413:positron emission tomography (PET) scan
75:
748:
652:: CS1 maint: archived copy as title (
321:is 200 – 210 GPa. It can be joined by
296:
721:
695:Shrivastava, Sanjay (January 2004).
475:resistant springs and diaphragms in
13:
14:
802:
722:Davis, Joseph R. (January 2000).
725:Nickel, Cobalt, and Their Alloys
668:"Super Alloy Havar (UNS R30004)"
348:
715:
688:
674:
660:
615:
1:
608:
16:High-performance cobalt alloy
532:
49:. It is highly resistant to
7:
552:
10:
807:
442:
395:used in the production of
18:
41:, possessing a very high
427:O in the targets by the
317:is 960-970 MPa and its
67:precipitation hardening
449:Hamilton Watch Company
728:. ASM International.
701:. ASM International.
382:particle accelerators
327:Gas metal arc welding
319:modulus of elasticity
561:are the following:
483:. Havar outperforms
469:corrosion resistance
463:Corrosion resistance
451:as an alloy for the
421:corrosion resistance
311:thermal conductivity
76:Chemical composition
65:resistance. It is a
506:and aged form, its
479:equipment handling
429:activation products
417:mechanical strength
313:is 13.0 W/m·K. Its
297:Physical properties
85:
43:mechanical strength
682:"Havar Alloy Foil"
335:resistance welding
83:
786:Molybdenum alloys
496:crevice corrosion
492:pitting corrosion
490:in resistance to
433:transition metals
411:commonly used in
409:beta plus emitter
309:is 8.3 g/cm. Its
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628:. Archived from
627:
619:
529:(~103 °C).
523:room temperature
512:tensile strength
502:environment. In
473:stress corrosion
403:enriched water.
370:medical implants
359:pressure sensing
315:tensile strength
86:
82:
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771:Chromium alloys
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623:"Archived copy"
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500:medical implant
488:stainless steel
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386:nuclear physics
363:process control
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791:Ferrous alloys
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557:Other special
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539:work hardening
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481:sour crude oil
471:allows use in
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61:. It has high
15:
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792:
789:
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784:
782:
779:
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776:Nickel alloys
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772:
769:
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761:Cobalt alloys
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753:
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735:9780871706850
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708:9781615032600
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670:. 2012-10-22.
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635:on 2013-05-10
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527:boiling point
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482:
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470:
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419:and the good
418:
414:
410:
406:
402:
398:
394:
389:
387:
383:
379:
375:
374:particle beam
371:
368:
367:biocompatible
364:
360:
356:
346:
344:
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328:
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320:
316:
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308:
304:
303:melting point
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118:(wt. %)
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59:biocompatible
56:
52:
48:
44:
40:
36:
32:
28:
22:
766:Biomaterials
724:
717:
697:
690:
676:
662:
637:. Retrieved
630:the original
617:
556:
543:cutting tool
536:
516:
466:
446:
393:proton beams
390:
376:windows for
352:
349:Applications
300:
115:(wt. %)
112:(wt. %)
79:
55:non-magnetic
47:heat-treated
45:. It can be
30:
26:
25:
756:Superalloys
519:Green death
504:cold-rolled
453:mainsprings
415:. The high
397:fluorine-18
365:equipment,
750:Categories
639:2016-12-23
609:References
602:Superalloy
541:under the
355:diaphragms
200:Molybdenum
70:superalloy
31:UNS R30004
566:Hastelloy
533:Machining
401:oxygen-18
378:beamlines
339:soldering
278:(balance)
257:Beryllium
219:Manganese
51:corrosion
781:Tungsten
648:cite web
596:Stellite
590:Nivaflex
553:See also
547:hardness
477:oilfield
455:used in
181:Tungsten
143:Chromium
57:. It is
33:, is an
572:Inconel
457:watches
443:History
431:of the
343:brazing
323:welding
307:density
95:Average
63:fatigue
53:and is
732:
705:
559:alloys
341:, and
301:Havar
290:12.79
238:Carbon
162:Nickel
124:Cobalt
92:Symbol
39:cobalt
633:(PDF)
626:(PDF)
584:Monel
578:Invar
508:yield
437:alloy
407:is a
399:from
372:, as
287:22.16
284:19.05
270:0.08
251:0.23
175:14.0
156:21.0
137:44.0
89:Metal
35:alloy
29:, or
27:Havar
21:Havar
730:ISBN
703:ISBN
654:link
510:and
494:and
485:316L
467:Its
357:for
331:GMAW
276:Iron
267:0.02
264:0.05
248:0.17
232:1.8
229:1.35
213:2.8
194:3.3
172:12.0
169:12.7
153:19.0
150:19.5
134:41.0
131:42.0
101:Max
517:In
498:in
384:in
380:of
361:in
333:),
245:0.2
226:1.6
210:2.0
207:2.2
191:2.3
188:2.7
109:(—)
106:(—)
98:Min
37:of
752::
650:}}
646:{{
549:.
439:.
345:.
337:,
325::
281:Fe
261:Be
223:Mn
204:Mo
166:Ni
147:Cr
128:Co
72:.
738:.
711:.
684:.
656:)
642:.
425:2
405:F
329:(
242:C
185:W
23:.
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